CN105949684A - Preparation method of wear-resistant tear-resistant fluororubber - Google Patents
Preparation method of wear-resistant tear-resistant fluororubber Download PDFInfo
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- CN105949684A CN105949684A CN201610469307.5A CN201610469307A CN105949684A CN 105949684 A CN105949684 A CN 105949684A CN 201610469307 A CN201610469307 A CN 201610469307A CN 105949684 A CN105949684 A CN 105949684A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K7/04—Fibres or whiskers inorganic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention relates to a preparation method of wear-resistant tear-resistant fluororubber, belonging to the technical field of high-polymer material preparation. The preparation method comprises the following steps: carrying out acid stripping on meerschaum used as a raw material to obtain ore fibers, carrying out composite enzyme treatment, carrying out surface modification by using low-temperature plasma to obtain a self-made reinforcer, and carrying out doping modification on fluororubber by using the self-made reinforcer, thereby finally obtaining the wear-resistant tear-resistant fluororubber. The enzyme and amino-acid-rich pineapple juice are utilized to carry out pre-modification on the meerschaum fibers, and the low-temperature plasma is utilized to further carry out surface modification on the ore fibers to increase the surface hydroxy and peroxy groups and enhance the dispersity, so that the ore fibers can be combined with polymers more easily; the added modified meerschaum fibers enhance the mechanical properties of the fluororubber, so that the fluororubber has favorable wear resistance (the friction factor is 0.6-0.8); and the fluororubber has high tear resistance (the tear strength is 35-45 kN/m), thereby widening the application range of the fluororubber.
Description
Technical field
The present invention relates to the preparation method of a kind of wear-resisting tear-resistant fluororubber, belong to field of polymer material preparing technology.
Background technology
Fluorubber (FKM) is the synthesis macromolecular elastomer on the carbon atom of main chain or side chain containing fluorine atom, and it is widely used in many fields such as space flight, military project, national defence, automobile, petrochemical industry.Fluorubber goods are mainly used in sealing member, packing ring, pad, barrier film, sebific duct, oil sealing, lining, anticorrosive products and electric insulation goods.Fluorubber is most widely used is automotive field, accounts for the 60~70% of application total amount.On auto parts and components, can be as engine fuel flexible pipe, refueling hose, petrolift, air-conditioning device O, and the encapsulant of injection apparatus, power piston, valve stem, bent axle, compressor of air conditioner.
Although fluorubber has excellent thermostability, non-oxidizability, oil resistivity and corrosion resistance, but fluorubber is as a kind of high molecular synthetic material, it also can be as other high molecular synthetic material, due to the common effect of the factor such as stress, medium in heat, oxygen and its working environment during using and storing, its performance can passage in time and be gradually reduced, even lose serviceability.It addition, the anti-wear performance of fluorubber (coefficient of friction is typically larger than 1) is the most not fully up to expectations, need to be improved further.In order to overcome the above-mentioned deficiency of fluorubber, scientific worker, from the angle of Molecular Design, is further introduced into fluorine atom in fluorubber body.But a large amount of introducings of fluorine atom, can cause being significantly increased of production cost, fluorubber strand rigidity can be caused to increase, may lose the elastic performance of rubber simultaneously.
Sepiolite fibre is as a kind of natural enhancement mode nonmetal clay mineral fiber, not only nonhazardous, aboundresources, value height, and owing to it has absorption property and the feature such as high temperature resistant, can be as the packing material improving rubber matrix combination property, thus expand the range of application of rubber composite, low yet with natural sepiolite breeze purity, bad dispersibility is low with polymer adhesion, constrains the sepiolite fibre application in field of compound material.
Summary of the invention
The technical problem to be solved: for the most traditional fluorubber exist elastic poor, anti-wear performance is not fully up to expectations, tear-resistant degraded performance, and meerschaum is as a kind of natural enhancement mode mineral fibres, the deficiency of Conventional fluoroelastomeric can be changed, but natural sepiolite bad dispersibility, low with polymer adhesion, it is difficult to the defect being applied to strengthen fluorubber, it is provided that the preparation method of a kind of wear-resisting tear-resistant fluororubber.The method is with meerschaum as raw material, peel off with acid and obtain ore deposit fiber, after compound enzyme processes, carry out surface modification with low temperature plasma again prepare self-control reinforcing agent, and with it to fluorubber doping vario-property, final prepared wear-resisting tear-resistant fluororubber, the present invention carries out pre-modification by enzyme with rich in amino acid whose pineapple juice to sepiolite fibre, again with low temperature plasma gas further to ore deposit fiber surface modification, increase its surface hydroxyl and peroxy, improve dispersibility, itself and polymer is made to be more easy to combine, solve natural sepiolite bad dispersibility, the problem being difficult to be combined with polymer, the addition of modified meerschaum fiber simultaneously, enhance fluorubber mechanical performance, compensate for again traditional fluorubber and exist elastic poor, anti-wear performance is not fully up to expectations, the deficiency of tear-resistant degraded performance, widen the range of application of fluorubber.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
(1) weigh after 800~900g meerschaum liquid nitrogen grinding machines grind 30~40min and cross 200 mesh standard sieves, meerschaum powder after sieving loads in beaker, it is that to add concentration in beaker be 0.3mol/L sulfuric acid solution to 1:5 by solid-to-liquid ratio, it is placed on shaking table vibration to peel off overnight, move into buchner funnel successively with dehydrated alcohol and deionized water filtering and washing 3~5 times, obtain sepiolite fibre;
(2) 500~600g sepiolite fibres obtained above are moved in fermentation tank, add 400~500mL pineapple juice, add the compound enzymic preparation of sepiolite fibre quality 10%, enzymolysis modified 6~8h it are incubated at 30~35 DEG C, enzymatic hydrolysate centrifuge is separated 10~15min with 3000~4000r/min rotating speeds, obtaining lower sediment thing, described compound enzymic preparation is to be prepared by the quality such as neutral protease and lipase is compounding;
(3) the lower sediment thing of above-mentioned preparation is moved in Cement Composite Treated by Plasma instrument, speed with 50~60mL/min is passed through argon inwards, carrying out low temperature plasma gas modified 15~20min under pressure 50~60Pa and 100~150W power condition, discharging obtains making by oneself rubber stiffener, standby;
(4) meter weighs 70~80 parts of inclined fluoroether rubber rubbers and 2~4 parts of cumyl peroxides load refining 10~15min in two roller mills and obtain premixing glue by weight;
(5) mark meter the most by weight is by the premixing glue of 100~120 parts of above-mentioned preparations, 5~10 parts of standby self-control rubber stiffeners, 1~3 part of magnesium oxide, 1~2 part of stearic acid and 1~3 part of N, load together in open mill after a N '-penylene BMI mix homogeneously and plasticate 15~20min, obtain elastomeric compound;
(6) elastomeric compound vulcanizing press obtained above is carried out vulcanizing treatment 20~30min at 140~150 DEG C, treat its natural cooling and at room temperature deposit 20~24h, obtaining wear-resisting tear-resistant fluororubber.
Wear-resisting tear-resistant fluororubber intensity prepared by the present invention is 15~30MPa, and elongation at break is 170~350%, and tearing strength is 35~45kN/m, and coefficient of friction is 0.6~0.8, and elasticity reaches A level, and thermostability is 270~290 DEG C, and hardness is 95~97 degree.
The present invention is compared with additive method, and Advantageous Effects is:
(1) wear-resisting tear-resistant fluororubber prepared by the present invention has good wearability, and coefficient of friction is 0.6~0.8;
(2) the tear-resistant performance of wear-resisting tear-resistant fluororubber that prepared by the present invention is high, and tearing strength is 35~45kN/m;
(3) preparation process of the present invention is simple, required low cost.
Detailed description of the invention
First weigh after 800~900g meerschaum liquid nitrogen grinding machines grind 30~40min and cross 200 mesh standard sieves, meerschaum powder after sieving loads in beaker, it is that to add concentration in beaker be 0.3mol/L sulfuric acid solution to 1:5 by solid-to-liquid ratio, it is placed on shaking table vibration to peel off overnight, move into buchner funnel successively with dehydrated alcohol and deionized water filtering and washing 3~5 times, obtain sepiolite fibre;500~600g sepiolite fibres obtained above are moved in fermentation tank, add 400~500mL pineapple juice, add the compound enzymic preparation of sepiolite fibre quality 10%, enzymolysis modified 6~8h it are incubated at 30~35 DEG C, enzymatic hydrolysate centrifuge is separated 10~15min with 3000~4000r/min rotating speeds, obtaining lower sediment thing, described compound enzymic preparation is to be prepared by the quality such as neutral protease and lipase is compounding;Then the lower sediment thing of above-mentioned preparation is moved in Cement Composite Treated by Plasma instrument, speed with 50~60mL/min is passed through argon inwards, carrying out low temperature plasma gas modified 15~20min under pressure 50~60Pa and 100~150W power condition, discharging obtains making by oneself rubber stiffener, standby;Meter weighs 70~80 parts of inclined fluoroether rubber rubbers and 2~4 parts of cumyl peroxides load refining 10~15min in two roller mills and obtain premixing glue by weight;Mark meter is by the premixing glue of 100~120 parts of above-mentioned preparations, 5~10 parts of standby self-control rubber stiffeners, 1~3 part of magnesium oxide, 1~2 part of stearic acid and 1~3 part of N the most by weight, load together in open mill after a N '-penylene BMI mix homogeneously and plasticate 15~20min, obtain elastomeric compound;Finally elastomeric compound vulcanizing press obtained above is carried out vulcanizing treatment 20~30min at 140~150 DEG C, treat its natural cooling and at room temperature deposit 20~24h, obtaining wear-resisting tear-resistant fluororubber.
Example 1
First weigh after 900g meerschaum liquid nitrogen grinding machine grinds 40min and cross 200 mesh standard sieves, meerschaum powder after sieving loads in beaker, it is that to add concentration in beaker be 0.3mol/L sulfuric acid solution to 1:5 by solid-to-liquid ratio, it is placed on shaking table vibration to peel off overnight, move into buchner funnel successively by dehydrated alcohol and deionized water filtering and washing 5 times, obtain sepiolite fibre;Sepiolite fibre obtained above for 600g is moved in fermentation tank, add 500mL pineapple juice, add the compound enzymic preparation of sepiolite fibre quality 10%, enzymolysis modified 8h it is incubated at 35 DEG C, enzymatic hydrolysate centrifuge is separated 15min with 4000r/min rotating speed, obtaining lower sediment thing, described compound enzymic preparation is to be prepared by the quality such as neutral protease and lipase is compounding;Then being moved in Cement Composite Treated by Plasma instrument by the lower sediment thing of above-mentioned preparation, be passed through argon inwards with the speed of 60mL/min, carry out low temperature plasma gas modification 20min under the pressure and 150W power condition of 60Pa, discharging obtains making by oneself rubber stiffener, standby;Meter weighs 80 parts of inclined fluoroether rubber rubbers and 4 parts of cumyl peroxides load refining 15min in two roller mills and obtain premixing glue by weight;Mark meter is by the premixing glue of 120 parts of above-mentioned preparations, 10 parts of standby self-control rubber stiffeners, 3 parts of magnesium oxide, 2 parts of stearic acid and 3 parts of N the most by weight, load in open mill, after a N '-penylene BMI mix homogeneously, the 20min that plasticates together, obtain elastomeric compound;Finally elastomeric compound vulcanizing press obtained above is carried out vulcanizing treatment 30min at 150 DEG C, treat its natural cooling and at room temperature deposit 24h, obtaining wear-resisting tear-resistant fluororubber.
After testing, wear-resisting tear-resistant fluororubber intensity prepared by the present invention is 30MPa, and elongation at break is 350%, and tearing strength is 45kN/m, and coefficient of friction is 0.8, and elasticity reaches A level, and thermostability is 290 DEG C, and hardness is 97 degree.
Example 2
First weigh after 800g meerschaum liquid nitrogen grinding machine grinds 30min and cross 200 mesh standard sieves, meerschaum powder after sieving loads in beaker, it is that to add concentration in beaker be 0.3mol/L sulfuric acid solution to 1:5 by solid-to-liquid ratio, it is placed on shaking table vibration to peel off overnight, move into buchner funnel successively by dehydrated alcohol and deionized water filtering and washing 3 times, obtain sepiolite fibre;Sepiolite fibre obtained above for 500g is moved in fermentation tank, add 400mL pineapple juice, add the compound enzymic preparation of sepiolite fibre quality 10%, enzymolysis modified 6h it is incubated at 30 DEG C, enzymatic hydrolysate centrifuge is separated 10min with 3000r/min rotating speed, obtaining lower sediment thing, described compound enzymic preparation is to be prepared by the quality such as neutral protease and lipase is compounding;Then being moved in Cement Composite Treated by Plasma instrument by the lower sediment thing of above-mentioned preparation, be passed through argon inwards with the speed of 50mL/min, carry out low temperature plasma gas modification 15min under the pressure and 100W power condition of 50Pa, discharging obtains making by oneself rubber stiffener, standby;Meter weighs 70 parts of inclined fluoroether rubber rubbers and 2 parts of cumyl peroxides load refining 10min in two roller mills and obtain premixing glue by weight;Mark meter is by the premixing glue of 100 parts of above-mentioned preparations, 10 parts of standby self-control rubber stiffeners, 1 part of magnesium oxide, 1 part of stearic acid and 1 part of N the most by weight, load in open mill, after a N '-penylene BMI mix homogeneously, the 15min that plasticates together, obtain elastomeric compound;Finally elastomeric compound vulcanizing press obtained above is carried out vulcanizing treatment 20min at 140 DEG C, treat its natural cooling and at room temperature deposit 20h, obtaining wear-resisting tear-resistant fluororubber.
After testing, wear-resisting tear-resistant fluororubber intensity prepared by the present invention is 15MPa, and elongation at break is 170%, and tearing strength is 35kN/m, and coefficient of friction is 0.6, and elasticity reaches A level, and thermostability is 270 DEG C, and hardness is 95 degree.
Example 3
First weigh after 850g meerschaum liquid nitrogen grinding machine grinds 35min and cross 200 mesh standard sieves, meerschaum powder after sieving loads in beaker, it is that to add concentration in beaker be 0.3mol/L sulfuric acid solution to 1:5 by solid-to-liquid ratio, it is placed on shaking table vibration to peel off overnight, move into buchner funnel successively by dehydrated alcohol and deionized water filtering and washing 4 times, obtain sepiolite fibre;Sepiolite fibre obtained above for 550g is moved in fermentation tank, add 450mL pineapple juice, add the compound enzymic preparation of sepiolite fibre quality 10%, enzymolysis modified 7h it is incubated at 32 DEG C, enzymatic hydrolysate centrifuge is separated 12min with 3500r/min rotating speed, obtaining lower sediment thing, described compound enzymic preparation is to be prepared by the quality such as neutral protease and lipase is compounding;Then being moved in Cement Composite Treated by Plasma instrument by the lower sediment thing of above-mentioned preparation, be passed through argon inwards with the speed of 55mL/min, carry out low temperature plasma gas modification 17min under the pressure and 120W power condition of 55Pa, discharging obtains making by oneself rubber stiffener, standby;Meter weighs 75 parts of inclined fluoroether rubber rubbers and 3 parts of cumyl peroxides load refining 12min in two roller mills and obtain premixing glue by weight;Mark meter is by the premixing glue of 110 parts of above-mentioned preparations, 7 parts of standby self-control rubber stiffeners, 2 parts of magnesium oxide, 1 part of stearic acid and 2 parts of N the most by weight, load in open mill, after a N '-penylene BMI mix homogeneously, the 17min that plasticates together, obtain elastomeric compound;Finally elastomeric compound vulcanizing press obtained above is carried out vulcanizing treatment 25min at 145 DEG C, treat its natural cooling and at room temperature deposit 22h, obtaining wear-resisting tear-resistant fluororubber.
After testing, wear-resisting tear-resistant fluororubber intensity prepared by the present invention is 17MPa, and elongation at break is 300%, and tearing strength is 40kN/m, and coefficient of friction is 0.7, and elasticity reaches A level, and thermostability is 280 DEG C, and hardness is 96 degree.
Claims (1)
1. the preparation method of a wear-resisting tear-resistant fluororubber, it is characterised in that concrete preparation process is:
(1) weigh after 800~900g meerschaum liquid nitrogen grinding machines grind 30~40min and cross 200 mesh standard sieves, meerschaum powder after sieving loads in beaker, it is that to add concentration in beaker be 0.3mol/L sulfuric acid solution to 1:5 by solid-to-liquid ratio, it is placed on shaking table vibration to peel off overnight, move into buchner funnel successively with dehydrated alcohol and deionized water filtering and washing 3~5 times, obtain sepiolite fibre;
(2) 500~600g sepiolite fibres obtained above are moved in fermentation tank, add 400~500mL pineapple juice, add the compound enzymic preparation of sepiolite fibre quality 10%, enzymolysis modified 6~8h it are incubated at 30~35 DEG C, enzymatic hydrolysate centrifuge is separated 10~15min with 3000~4000r/min rotating speeds, obtaining lower sediment thing, described compound enzymic preparation is to be prepared by the quality such as neutral protease and lipase is compounding;
(3) the lower sediment thing of above-mentioned preparation is moved in Cement Composite Treated by Plasma instrument, speed with 50~60mL/min is passed through argon inwards, carrying out low temperature plasma gas modified 15~20min under pressure 50~60Pa and 100~150W power condition, discharging obtains making by oneself rubber stiffener, standby;
(4) meter weighs 70~80 parts of inclined fluoroether rubber rubbers and 2~4 parts of cumyl peroxides load refining 10~15min in two roller mills and obtain premixing glue by weight;
(5) mark meter the most by weight is by the premixing glue of 100~120 parts of above-mentioned preparations, 5~10 parts of standby self-control rubber stiffeners, 1~3 part of magnesium oxide, 1~2 part of stearic acid and 1~3 part of N, load together in open mill after a N '-penylene BMI mix homogeneously and plasticate 15~20min, obtain elastomeric compound;
(6) elastomeric compound vulcanizing press obtained above is carried out vulcanizing treatment 20~30min at 140~150 DEG C, treat its natural cooling and at room temperature deposit 20~24h, obtaining wear-resisting tear-resistant fluororubber.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108623951A (en) * | 2018-03-20 | 2018-10-09 | 凯斯通阀门有限公司 | A kind of explosion-proof fluorubber of modification for valve |
CN109351201A (en) * | 2018-12-10 | 2019-02-19 | 河南工程学院 | A kind of porous nanometer material blending and modifying film and preparation method thereof |
CN114806046A (en) * | 2022-05-17 | 2022-07-29 | 山东非金属材料研究所 | Wide-temperature-range low-friction heat-tearing-resistant vinylidene fluoride rubber and preparation method thereof |
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2016
- 2016-06-25 CN CN201610469307.5A patent/CN105949684A/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108623951A (en) * | 2018-03-20 | 2018-10-09 | 凯斯通阀门有限公司 | A kind of explosion-proof fluorubber of modification for valve |
CN109351201A (en) * | 2018-12-10 | 2019-02-19 | 河南工程学院 | A kind of porous nanometer material blending and modifying film and preparation method thereof |
CN109351201B (en) * | 2018-12-10 | 2021-06-08 | 河南工程学院 | Porous nano material blending modified membrane and preparation method thereof |
CN114806046A (en) * | 2022-05-17 | 2022-07-29 | 山东非金属材料研究所 | Wide-temperature-range low-friction heat-tearing-resistant vinylidene fluoride rubber and preparation method thereof |
CN114806046B (en) * | 2022-05-17 | 2023-05-09 | 山东非金属材料研究所 | Wide-temperature-range low-friction heat-tearing-resistant vinylidene fluoride rubber and preparation method thereof |
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Application publication date: 20160921 |